Tablet PC Battery: Battery Cell: Polymer Voltage:3.7V Capacity:3000mAh Laptop Battery/Tablet PC Battery Cell: Polymer/Li-ion PolymerSize:45*55*107Voltage:7.4VCapacity:3000mAhfits for Hp100, H100,T10...... *Function of PCB: Protection of Short-Circuit, Over-Charge, Over-Voltage, Under-Voltage; We can provide the polymer battery pack according to the size and space with high capacity.